wannacry | 87472f9d103ac03e57a2ed4b5d7e0a239c48bd371a00d35696a067804233f3e2

Analysis

max time kernel
150s
max time network
150s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
25-08-2024 05:18

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General

Target

c00746c27c6f8cf3c8e99e49cd02609d_JaffaCakes118.dll
Size

5.0MB
MD5

c00746c27c6f8cf3c8e99e49cd02609d
SHA1

d6fd7e085422e23b56bb53355528f4889425ac3c
SHA256

87472f9d103ac03e57a2ed4b5d7e0a239c48bd371a00d35696a067804233f3e2
SHA512

0dc37029c2935cf254c9fa6aee5e4dd5afb6a84a807403bad44ed7af7d90ccd543e86fa8d5422fd52ab96498529e5e5259fe7328b12e3f42161baf1c9be4d39b
SSDEEP

49152:SnjQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnv:+8qPoBhz1aRxcSUDk36SAEdhv

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3313) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046

Executes dropped EXE 3 IoCs

pid	Process
3040	mssecsvc.exe
2912	mssecsvc.exe
2492	tasksche.exe

Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\counters.dat	mssecsvc.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\WINDOWS\mssecsvc.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvc.exe

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe

Modifies data under HKEY_USERS 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2316 wrote to memory of 2972	2316	rundll32.exe	30
PID 2316 wrote to memory of 2972	2316	rundll32.exe	30
PID 2316 wrote to memory of 2972	2316	rundll32.exe	30
PID 2316 wrote to memory of 2972	2316	rundll32.exe	30
PID 2316 wrote to memory of 2972	2316	rundll32.exe	30
PID 2316 wrote to memory of 2972	2316	rundll32.exe	30
PID 2316 wrote to memory of 2972	2316	rundll32.exe	30
PID 2972 wrote to memory of 3040	2972	rundll32.exe	31
PID 2972 wrote to memory of 3040	2972	rundll32.exe	31
PID 2972 wrote to memory of 3040	2972	rundll32.exe	31
PID 2972 wrote to memory of 3040	2972	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c00746c27c6f8cf3c8e99e49cd02609d_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2316
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c00746c27c6f8cf3c8e99e49cd02609d_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2972
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:3040
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2492

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:2912

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
0a43264152308915166b769cb06e5c22

SHA1
842a188d078d2feea50bd7caec1340262ec403ce

SHA256
3d262736288b669891351783caedd1312436c8446ad4f713222bed1669222104

SHA512
a0b8226f097a7edf099584c8666cac1d285aedd456354396381d90d6587accf50497ad86a0620213b7496e973d3adafd220df5a88b2612477e1bfdb3659ff3a1

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
0c47cb295262b88d54e6c38aaae45083

SHA1
c5af34f55b424fd3b1d50d8257bc2339330e8462

SHA256
89d41ea8ff8ede377c17078b8c1f471d84fe1a5e3c51d50455f99edc4c40fc94

SHA512
688ce8730e0b31990fba2c01a81055af0af0875d4106bb8fa566b8de35ef5fb48b70dae9b295fd391fb24db21cebfdc6fd7ac9f8bb84f3c54b8416b86b2f6fc4

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